Can vouch for Kraken.io -- I've just begun using it to optimize ~50k+ interior architectural images so fidelity is important to me and my users. I'm about a thi

Can vouch for Kraken.io -- I've just begun using it to optimize ~50k+ interior architectural images so fidelity is important to me and my users. I'm about a third of the way done with the project and am saving just about 40% in size on average.